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1. This Convention shall be interpreted so far as possible to be compatible with other treaties in force for Contracting States, whether concluded before or after this Convention.
2. This Convention shall not affect the application by a Contracting State of a treaty that was concluded before this Convention.
3. This Convention shall not affect the application by a Contracting State of a treaty concluded after this Convention as concerns the recognition or enforcement of a judgment given by a court of a Contracting State that is also a Party to that treaty. Nothing in the other treaty shall affect the obligations under Article 6 towards Contracting States that are not Parties to that treaty.
4. This Convention shall not affect the application of the rules of a Regional Economic Integration Organisation that is a Party to this Convention as concerns the recognition or enforcement of a judgment given by a court of a Contracting State that is also a Member State of the Regional Economic Integration Organisation where –
a) the rules were adopted before this Convention was concluded; or
b) the rules were adopted after this Convention was concluded, to the extent that they do not affect the obligations under Article 6 towards Contracting States that are not Member States of the Regional Economic Integration Organisation.